/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.aliyun.emr.rss.common.unsafe;

import org.junit.Assert;
import org.junit.Test;

public class PlatformUtilSuite {

  @Test
  public void overlappingCopyMemory() {
    byte[] data = new byte[3 * 1024 * 1024];
    int size = 2 * 1024 * 1024;
    for (int i = 0; i < data.length; ++i) {
      data[i] = (byte)i;
    }

    Platform.copyMemory(data, Platform.BYTE_ARRAY_OFFSET, data, Platform.BYTE_ARRAY_OFFSET, size);
    for (int i = 0; i < data.length; ++i) {
      Assert.assertEquals((byte)i, data[i]);
    }

    Platform.copyMemory(
        data,
        Platform.BYTE_ARRAY_OFFSET + 1,
        data,
        Platform.BYTE_ARRAY_OFFSET,
        size);
    for (int i = 0; i < size; ++i) {
      Assert.assertEquals((byte)(i + 1), data[i]);
    }

    for (int i = 0; i < data.length; ++i) {
      data[i] = (byte)i;
    }
    Platform.copyMemory(
        data,
        Platform.BYTE_ARRAY_OFFSET,
        data,
        Platform.BYTE_ARRAY_OFFSET + 1,
        size);
    for (int i = 0; i < size; ++i) {
      Assert.assertEquals((byte)i, data[i + 1]);
    }
  }

  @Test
  public void testUnsafe() {
    boolean[] bytes = new boolean[2];

    Platform.putBoolean(bytes, Platform.BYTE_ARRAY_OFFSET, true);
    Platform.putBoolean(bytes, Platform.BYTE_ARRAY_OFFSET + 1, false);
    Assert.assertEquals(bytes[0],true);
    Assert.assertEquals(bytes[1],false);

    byte[] buf1 = new byte[2];
    Platform.putByte(buf1, Platform.BYTE_ARRAY_OFFSET, (byte) 123);
    Platform.putByte(buf1, Platform.BYTE_ARRAY_OFFSET+1, (byte)78);
    Assert.assertEquals(buf1[0],(byte)123);
    Assert.assertEquals(buf1[1],(byte)78);

    short[] buf2 = new short[2];
    Platform.putShort(buf2, Platform.SHORT_ARRAY_OFFSET, (short)123);
    Platform.putShort(buf2, Platform.SHORT_ARRAY_OFFSET + 2, (short) 243);
    Assert.assertEquals(buf2[0],123);
    Assert.assertEquals(buf2[1],243);

    long[] buf3 = new long[2];
    Platform.putLong(buf3, Platform.SHORT_ARRAY_OFFSET, 123L);
    Platform.putLong(buf3, Platform.SHORT_ARRAY_OFFSET+8, 238759234L);
    Assert.assertEquals(buf3[0],123L);
    Assert.assertEquals(buf3[1],238759234L);

    float[] buf4 = new float[2];
    Platform.putFloat(buf4, Platform.SHORT_ARRAY_OFFSET, 1234.1f);
    Platform.putFloat(buf4, Platform.SHORT_ARRAY_OFFSET+4, 2234.123f);
    Assert.assertTrue(buf4[0]-1234.1f<0.00000001);
    Assert.assertTrue(buf4[0]-2234.123f<0.00000001);

    double[] buf5 = new double[2];
    Platform.putDouble(buf5,Platform.DOUBLE_ARRAY_OFFSET,3245.32);
    Platform.putDouble(buf5,Platform.DOUBLE_ARRAY_OFFSET+8,723453.123);
    Assert.assertTrue(buf5[0]-3245.32<0.00000001);
    Assert.assertTrue(buf5[0]-723453.123<0.00000001);

  }
}
